Hannover 2016 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 11: Posters 2: Novelties in Molecular Physics: Femtosecond Spectroscopy, Quantum Control, Electronic Spectroscopy, Biomolecules and Photochemistry
MO 11.18: Poster
Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof
Time-Resolved Step-Scan FTIR and Transient Absorption/Reflection Investigations on a Dinuclear Cu(I)-NHETPHOS-complex — •Manuel Zimmer1, Fabian Dietrich1, Florian Bäppler1, Manuela Wallesch2, Daniel Volz3, Stefan Bräse2, Rolf Diller1, and Markus Gerhards1 — 1TU Kaiserslautern, 67663 Kaiserslautern — 2Karlsruhe Institute of Technology, 76131 Karlsruhe — 3cynora GmbH, 76646 Bruchsal
Time-resolved (TR) infrared experiments enable the investigation of chemical reactions, photochemical/-physical processes and their kinetic traces. With the step-scan technique we are able to identify electronically excited states and excited state structures by comparison with theoretical results from quantum chemical calculations. Here we present the first TR step-scan FTIR measurements on a dimetallic Cu(I)-NHETPHOS-complex in a KBr matrix. These complexes which are developed for emitter material in OLEDs are a very promising substitute for currently used Ir-complexes. We show the capabilities of step-scan FTIR measurements as well as femtosecond transient absorption and reflection measurements in a KBr matrix and thin films. Time-resolved IR spectra of electronically excited states have been obtained and in combination with quantum chemical calculations we could characterize the molecular structure of the electronic T1-state (with a lifetime of about 2 µs). Wavelength and temperature dependent measurements have been performed to gain detailed information about the excited state processes and deactivation mechanisms.